Answer: Yes!
1) Seals make me laugh?
2) Seals make me laugh.
3) Seals make me laugh!
4) "Seals make me laugh"
Well, 3 third one seems good, if you are exaggerating something like about your likes - you should definitely go for exclamation mark. Also it would mean to express your emotions. Exclamation is used to indicate strong feelings, or to show emphasis